Very regular high-frequency pulsation modes in young intermediate-mass stars

Bedding, Timothy R.; Murphy, Simon J.; Hey, Daniel R.; Huber, Daniel; Li, Tanda; Smalley, B.; Stello, Dennis; White, Timothy R.; Ball, Warrick H.; Chaplin, W. J.; Colman, Isabel L.; Fuller, Jim; Gaidos, Eric; Harbeck, Daniel; Hermes, J. J.; Holdsworth, Daniel Luke; Li, Gang; Li, Yaguang; Mann, Andrew; Reese, D. R.; Sekaran, S.; Jiang, Yu; Antoci, V.; Bergmann, Christoph; Brown, Timothy M.; Howard, Andrew W.; Ireland, Michael; Isaacson, Howard; Jenkins, Jon M.; Kjeldsen, H.; McCully, C.; Rabus, M.; Rains, Adam D.; Ricker, G.; Tinney, C. G.; Vanderspek, R.

doi:10.1038/s41586-020-2226-8

Cited by 89 publications

(94 citation statements)

References 99 publications

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“…The oscillatory modes of an important family of stars known as δ Scuti stars have been difficult to identify. Bedding et al 1 have identified a group of δ Scuti stars that pulsate at a high rate and with regular patterns of frequency that agree with theoretical predictions. This allowed the oscillation modes to be identified.…”

Section: József M Benkő and Margit Paparómentioning

confidence: 56%

“…The spleen is a target of top-down control from the brain 1 . Zhang et al 2 have taken our understanding of brain-spleen connections to the next level by revealing on page 204 an aspect of top-down control that regulates the adaptive immune system.…”

Section: József M Benkő and Margit Paparómentioning

confidence: 99%

“…There is, however, a tool we can use to look into the interior of the stars: asteroseismology. On page 147, Bedding et al 1 report that a subgroup of the enigmatic δ Scuti stars exhibits regular pulsations that will finally enable the stars to be probed using this tool.…”

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confidence: 99%

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A glimpse inside δ Scuti stars

Benkő¹,

Paparó²

2020

Nature

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Section: József M Benkő and Margit Paparómentioning

confidence: 56%

Section: József M Benkő and Margit Paparómentioning

confidence: 99%

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A glimpse inside δ Scuti stars

Benkő¹,

Paparó²

2020

Nature

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“…intermediate-mass main-sequence stars that had never been considered before (Antoci et al, 2011;Bedding et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

Solar-Like Oscillators in the Kepler Era: A Review

Jackiewicz

2021

Front. Astron. Space Sci.

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Many late-type stars across the Milky Way exhibit observable pulsations similar to our Sun that open up a window into stellar interiors. The NASA Kepler mission, a space-based photometric telescope, measured the micro-magnitude luminosity fluctuations caused by solar-like oscillations of tens of thousands of stars for almost 10 years. Detailed stellar structure, evolution, and oscillation theoretical work established in the decades before, such as predictions about mode mixing in the interior of red-giant stars, among many others, now had voluminous precision data against which it could be tested. The overwhelming result is the general validation of the theory of stellar oscillations as well as stellar-structure models; however, important gaps in our understanding of interior physics was also revealed by Kepler. For example, interior rotation, convection, and mixing processes are complex phenomena not fully captured by standard models. This review explores some of the important impacts Kepler observations of solar-like oscillations across the cool end of the H-R diagram has had on stellar astrophysics through the use of asteroseismology.

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“…Fortunately, δ Sct stars early in their main-sequence lifetime have simpler patterns as their cores are less perturbed by changes in composition gradient at the convective core boundary that lead to "avoided crossings" and modes with mixed p-and g-mode character. Bedding et al (2020) found complete very regular sequences of p modes among 60 young δ Sct variables observed by Kepler and TESS (see section 4) and was able to use these to identify the modes, with an assumption that the highest amplitude mode in about 1/3 of the sample stars at frequency 18-23 d −1 likely is the radial fundamental (n = 1, ℓ = 0) p mode, finally opening a window for δ Sct asteroseismology. This task may have been made easier by many stars in the sample having relatively slow rotation or possibly being observed poleon, so that large rotational splittings did not confuse the sequence (Benkő and Paparó, 2020).…”

Section: Finding and Interpreting Frequency (Period) Spacing Patternsmentioning

confidence: 90%

Highlights of Discoveries for δ Scuti Variable Stars From the Kepler Era

Guzik

2021

Front. Astron. Space Sci.

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The NASA Kepler and follow-on K2 mission (2009–2018) left a legacy of data and discoveries, finding thousands of exoplanets, and also obtaining high-precision long time-series data for hundreds of thousands of stars, including many types of pulsating variables. Here we highlight a few of the ongoing discoveries from Kepler data on δ Scuti pulsating variables, which are core hydrogen-burning stars of about twice the mass of the Sun. We discuss many unsolved problems surrounding the properties of the variability in these stars, and the progress enabled by Kepler data in using pulsations to infer their interior structure, a field of research known as asteroseismology.

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Very regular high-frequency pulsation modes in young intermediate-mass stars

Cited by 89 publications

References 99 publications

A glimpse inside δ Scuti stars

A glimpse inside δ Scuti stars

Solar-Like Oscillators in the Kepler Era: A Review

Highlights of Discoveries for δ Scuti Variable Stars From the Kepler Era

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